{use $tree}
<ul class="navigation">
{raw wcv_list_from_iterator( $tree, 0, 1 )}
</ul>
{if $tree->selected &&
    $tree->selected->selected &&
    is_class( $tree->selected->selected, "wcvIndexerTreeSubtree" ) }
<ul class="subnavigation">
{raw wcv_list_from_iterator( $tree->selected->selected, 1, 2 )}
</ul>
{/if}